Physical Characteristics: Half-orcs occasionally inherit the green skin of their orc parent, but usually they have normal human skin. It is very rare that a half-orc gets tusks, but even when they do, they are very small. In any case, a half-orc will have red or black eyes and brown or black hair. They are between six and seven feet tall and weigh 200 to 350 lbs.
Social Attributes: The problem-solving skills of a half-orc are limited; that is to say, they tend to consist of smashing the problem, and if that doesn't work, smash harder. This is an generalization (they are, after all, half-human), but their orc blood usually prevents them from thinking very rationally or having patience. For this reason, they usually partner up with a more intelligent creature to prevent themselves from making big mistakes.
Roleplaying Notes: Half-orcs sometimes try to act human, but usually fail. They are too dull-witted and orc-like to mistake for a normal human. However, they still are half-human, so don't make them act completely orcish either. Try to combine human and orc qualities to find a sort of medium, and build the half-orc's personality around that.